Almost any AGP or PCI card noted at http://forums.cnet.com/5208-7591_102-0.html?messageID=3132959&tag=forums06;posts#3132959 will do fine here.
Sadly you will find these going in and out of stock and the models I noted last week are no more. Too bad you didn't get that fine ATI 9600 AGP 256MB card for cheap while it was in stock.
Bob
do I need to upgrade my Dimension 4600 to be able to use a 22 inch LCD monitor?
The graphics card is NVIDIA Ge Force4MX440 with AGP8X
Windows XPsp3
350 Watt Power supply

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic